1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a9c51076d80969ed6900c829d75c7999944ca946858c8b4106b47ea2877f4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05e7853d-2925-4155-bbb4-00477f293ca3.json and https://artists.proofprofile.net/proofs/artist/05e7853d-2925-4155-bbb4-00477f293ca3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30aa7db77bf6ee57973cbe3b3d12ad95c03eb75e4c8c106ac71318156c575a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEF1902744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8257d351d0f70663f7dd92d681c16c60c29006f5c3dd83fdee13322db7832c. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEE1966547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beae1e0e6895505dc829e73fb99d81328e0e99f6932334898cbaefca45a6196. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEE1966568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9864e213934beba29641b290bc363f4c3ba01adabbd1ba2336be8bf7978d99. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEE1966609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c04d194c2137b8e51af31384bae496f6322c410e3e08ea652ca7d78e36ac6. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEJ1975588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f14be4e4e084ebf777740b2bd73de75de569325ff64b558485db08920b96f1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFB2055887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d3097ee3a366900a308dc695c04d4602659432906f0ac6d04b524f482b34b. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2086902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d3097ee3a366900a308dc695c04d4602659432906f0ac6d04b524f482b34b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2086902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ecd4cd859a6f92885df618382c8f4842c551c585cb37fed6181a08977193e9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2087556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9614745bb2983ec7e8233707960424c611b4c03bd39aa5a50b950e73cad5a36. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAER2050146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc3c7670b73d7aa67273f7422ad2e08ed7119775e22ee0441ac8fd3c83cfc44. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFD2087629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e3d77653c7e07036b30ab4399bcb3a8031a683bad9a1f659444cebc96e67aa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL2164013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245d5115c29a4213d737bd4d6b087af7bce8f8ec09578054868c52ca0e535c41. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL2164011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bc4026272cb13ce8ee431a2a49724db10f253b4da902634798ba87c8d25a76. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL2164012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c0cdf451b084c75074e6fe77e76c7f76d6d0042cc1c6d0dfbf37c41a4d6bc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2390377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbae380646ad42309a00ebd3559d97810ffe148e23bc17a47267fc50251ccb26. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2390378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f12039ae8407101c72d6c16d8cf2e7e9f30c718c01b9021605a923f2b3d1bcb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2390379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bf0a93e40dc66b3e72daadf6c781c15dd01e68186b6d38d40aa7d803d3d62b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62323236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef7183802ad0c884dc243e49ddc147f1cb9a042eab58a67ade6f43861d571c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2390382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6469867843bf0cbd70125075a2b6cf7c93b69928f2b173bdb42f1ca60db13b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6P42331273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa1371a5c13943ba1d416bb377533e9de4ca3a95c1d0003b8c4d066d0fb6306. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2390386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c85e79d934ad7ed825a22c3196597081ad6c6afeef707064aea714cffba9a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2390387.